Thank you for the response. So if I cut it back to the first set of leaves, will it continue to grow from the cut stem, or is it more likely a new shoot will emerge from the tuber?

You will have the result of new growth from the cut stems and likely also from the tuber itself and a vastly improved overall plant. Also, yes, get it outside to enjoy as much sunshine and warmth for the time being until ready to be planted out. :)

PS, I LOVE dahlias !!

Thank you. I so appreciate the input.

Oh, you're welcome Raymondo,, that's a beautiful dahlia variety, do be sure to post photos when it's in bloom! :)

Will do. Tomorrow is planting day. 😊